The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 15, 1993
Filed:
Apr. 03, 1992
Kenji Kawano, Atsugi, JP;
Toshinori Nozawa, Kunitachi, JP;
Hiromichi Jumonji, Tama, JP;
Tsutomu Kitou, Mito, JP;
Osamu Mitomi, Isehara, JP;
Toshio Suzuki, Tokyo, JP;
Mitsuaki Yanagihashi, Mitaka, JP;
Kazuto Noguchi, Isehara, JP;
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
Abstract
An electrically controlled optical device effective index includes a traveling wave electrode, a shield conductor and a thick buffer layer of a low dielectric constant. The thickness of an overlaid layer disposed between the traveling wave electrode and the shield conductor as well as the thickness of the buffer layer is so determined that an effective index of a microwave transmitted through the traveling wave electrode approaches an effective index of light transmitted through an optical waveguide, and that a microwave conductor loss is reduced, and that a characteristic impedance of said traveling wave electrode approaches a characteristic impedance of an associated external microwave circuit.